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How United Kingdom ranks worldwide on dormant space, the transfer market, routing security and address density.
PeeringDB-registered presence.
APNIC-measured end-user deployment.
Clean prefixes (valid RPKI + IRR, no mismatch).
Cumulative IPv4, IPv6, and ASN allocations to United Kingdom over time.
The largest autonomous systems registered to United Kingdom by IPv4 footprint.
United Kingdom against its land-border neighbours on IPv4, IPv6, AS numbers and per-capita density.
Share of announced address space covered by valid Route Origin Authorizations.
3,134 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 173 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 368 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 4,290 |
| 65.8K |
| — |
| 2 |
| AS21296GB | ASN-PwC-UK Pricewaterhousecoopers Services Limited | 66K | — | 3 |
| AS50292GB | STRATOGEN Access UK Ltd | 66.8K | — | 37 |
| AS30740GB | EXA-NETWORKS Exa Networks Limited | 67.1K | 524.3K | 5 |
| AS24775GB | AS24775 Qinetiq Limited | 69.6K | — | 2 |
| AS35575GB | VAIONI Vaioni Group Ltd | 73.2K | 131.1K | 38 |
| AS3223GB | VOXILITY Voxility LLP | 75.3K | 284 | 279 |
| AS31727GB | NODE4-AS Node4 Limited | 78.8K | 131.1K | 145 |
| AS16082GB | SPITFIRE Spitfire Network Services Limited | 79.9K | 65.5K | 13 |
| AS51561GB | AS-ICUK ICUK Computing Services Limited | 80.1K | 65.5K | 74 |
| AS214238GB | iwihost HOST TELECOM LTD | 80.9K | — | 316 |
| AS8435GB | LBG_INTERNET_EDGE Lloyds Banking Group PLC | 81.2K | — | 51 |
| AS60187GB | LGFL-AS London Grid for Learning Trust | 81.7K | 786.4K | 49 |
| AS2818GB | BBC BBC | 81.9K | 196.6K | 7 |
| AS61323GB | UKFAST ANS ACADEMY LIMITED | 82.7K | 589.8K | 66 |
| AS29550GB | SIMPLYTRANSIT Team Blue Carrier Limited | 86K | 69.6K | 14 |
| AS24867GB | Adapt-AS Rackspace Ltd. | 86.3K | — | 14 |
| AS31515GB | AS-INMARSAT Inmarsat Global Limited | 87.6K | 65.5K | 55 |
| AS21267GB | Wavenet-AS21267 Wavenet Limited | 89.6K | 65.5K | 64 |
| AS42973GB | METRONETUK_M24SEVEN Convergence Group (Wireless) Networks Limited | 95.7K | — | 62 |
| AS25160GB | VORBOSS Vorboss Limited | 97K | 1.6M | 37 |
| AS44574GB | A4N Network Services Ltd. | 98K | 524.3K | 27 |
| AS58065GB | PacketExchange Orion Network Limited | 98K | 6 | 386 |
| AS49758GB | LLOYDSBANKING Lloyds Banking Group PLC | 98.3K | — | 11 |
| AS214143GB | skydigital-telecom SKYDIGITAL TELECOM LTD | 98.8K | — | 279 |
| AS48101GB | TROOLI-AS Trooli Ltd. | 99.1K | 459K | 75 |
| AS5503GB | RMIFL RM Education Ltd | 99.3K | 65.5K | 41 |
| AS12701GB | BARCAP Barclays Bank plc | 100.1K | — | 33 |
| AS16247GB | M247-UK Convergence Group (Wireless) Networks Limited | 100.6K | 98.3K | 236 |
| AS21433GB | AccentureFSSC Accenture UK Limited | 103.7K | 107 | 382 |
| AS39326GB | HSO-GROUP Syntura Group Limited | 103.7K | 131.3K | 33 |
| AS13213GB | UK2NET-AS THG HOSTING LIMITED | 105.7K | 4.1K | 126 |
| AS8586GB | OBSL-AS TalkTalk Communications Limited | 108K | 65.5K | 17 |
| AS56329GB | GIGACLEAR Gigaclear Limited | 110.6K | 1.1M | 34 |
| AS6908GB | DATAHOP Six Degrees Technology Group Limited | 113.2K | 786.4K | 49 |
| AS42831GB | UKSERVERS-AS UK Dedicated Servers Limited | 114.4K | 721.2K | 285 |
| AS41354GB | its-tg ITS Technology Group Limited | 119.3K | 528.4K | 45 |
| AS5587GB | ITILITY-LIMITED Itility Limited | 121.9K | 524.3K | 14 |
| AS41230GB | ASK4 ASK4 Limited | 122.1K | 3.7M | 23 |
| AS60068GB | CDN77 Datacamp Limited | 128.5K | 19.2K | 496 |
| AS8651GB | MUSI MUFG Securities EMEA PLC | 131.3K | — | 10 |
| AS209237GB | NPL-MANG-LTD NPL Management LTD | 131.6K | — | 4 |
| AS198864GB | QMW-AC-UK Queen Mary University of London | 132.9K | 65.6K | 7 |
| AS21054GB | UK-NATWEST-AS21054 Natwest Markets PLC | 134.4K | — | 13 |
| AS15404GB | COLT Technology Services Group Limited | 146.2K | 69.6K | 155 |
| AS25369GB | BANDWIDTH-AS Hydra Communications Ltd | 147.2K | 655.9K | 307 |
| AS47474GB | Virtual1 Virtual1 Limited | 153.3K | 65.5K | 17 |